In 1993, he was cast as a bumbling Japanese businessman in a college production of Anything Goes.[4] In 1998, Hoashi starred in the lead role of Onizuka in Onizuka, Kona's Son, an unsuccessful musical play about U.S. astronauts.[5] In 2000, Hoashi created the world's first martial artsmusical comedy play, "Memoirs of a Ninja",[6] for which he won five Maddy Awards, five Garland Award nominations, and was honored as being among "The Best of Theatre 2000" by NiteLife After Dark magazine.[7] He earned another Maddy Award for his portrayal of "Sakini" in "The Teahouse of the August Moon" for FireRose Productions.

In 2006, he co-founded the New York Summer Music Festival music camp in Oneonta, New York, and is current director of communications and media, head of the camp's writing & acting program, and resident actor.[2] His narration was featured at the 2010 New York Summer Music Festival's "The Lady Is a Song" concert, starring Ann Hampton Callaway.[8]

Of Hoashi's performance in Anything Goes, the Daily Gazette claimed he was miscast, writing "Even when apparently seasick or drunk, Hoashi came across as intelligent and competent, not a befuddled, confused non-English-speaking Asian."[4]

Of his original play, "Memoirs of a Ninja", NiteLite After Dark praised the production, writing "Hoashi's quirky lyrics and twirled-about concepts are a clever mix of fun, frolic and belly laughs with political, social, moral, ethical, and cynical commentary that hilariously sideswipe political correctness, stereotypes, traditional thinking, racism, sexism, ageism and every other 'ism' in between."[7]